The best green cars on sale

The What Car? Green Awards, which were held in London last night, recognised
the stand out models on sale when it comes to emissions (not just CO2
output), whole-life costs, driveability and reliability. It put each car
through its 'True mpg' test, which measures a car's fuel economy and CO2
emissions in normal, everyday driving.

Click through this gallery to see what took top honours in each category, as
well as What Car?'s overall Green Car of the Year 2012